objects
Class EuArc

java.lang.Object
  |
  +--objects.EuObject
        |
        +--objects.EuParametrized
              |
              +--objects.EuCircle
                    |
                    +--objects.EuArc

All Implemented Interfaces:

java.lang.Cloneable

Direct Known Subclasses:

plotArc

public class EuArc

extends EuCircle

An instance of this class represents a circle, represented as a cartesian pair and a real.

Field Summary

fundamentals.EuAngle	inAngle The parameter at which the arc begins, moving counterclockwise.
fundamentals.EuAngle	outAngle The parameter at which the arc ends, moving counterclockwise.

Fields inherited from class objects.EuCircle

degenerate, radius

Fields inherited from class objects.EuParametrized

anchor

Fields inherited from class objects.EuObject

infoHash, provenience, scaledown

Constructor Summary

EuArc()
Contructor for dummy object

EuArc(double x, double y, double r, double s, double t)
The constructor does initialization.

EuArc(objects.EuArc a, objects.EuPoint p1, objects.EuPoint p2)
The arc is instantiated as a subarc of the given arc, and with endspoints in the given points

EuArc(objects.EuCircle a, objects.EuPoint p1, objects.EuPoint p2)
The arc is instantiated as a subarc of the given circle, and with endpoints in the given points, going counterclockwise from p1 to p2.

Method Summary

fundamentals.EuVector	anInnerPoint() Describe anInnerPoint method here.
fundamentals.EuVector	atInEnd() Describe atInEnd method here.
fundamentals.EuVector	atOutEnd() Describe atOutEnd method here.
boolean	castIdentical(objects.EuObject other) See if passed object can be cast to the present one.
double	closestParameter(double x, double y) Find the parameter value which yields the closest point to a given one.
objects.plotCollection	computeClip(fundamentals.mouseInfo info) Compute the visible portion of the object as a collection of arcs, intervals or points.
boolean	interiorContains(fundamentals.EuVector point) See if passed point lies inside the arc
protected fundamentals.EuVector	invisibleRandomPoint(fundamentals.mouseInfo info, java.util.Random croupier) Chooses a sensible point on the arc when the arc is invisible.
boolean	isFull() Describe isFull method here.
boolean	overlaps(objects.EuObject other) See if another object overlaps nontrivially with this one.
java.lang.String	params() Describe params method here.
void	passArguments(fundamentals.EuArguments args) Read off parameters describing the object and add to passed EuArguments instance
java.lang.String	toNaturalLanguage(int language, boolean determined) Describe toNaturalLanguage method here.
java.lang.String	toString() Describe toString method here.
char	typeName() Describe typeName method here.

Methods inherited from class objects.EuCircle

atParameter, cloneMe, closestParameterOnCircle, closureContainsObject, confusionDistance, nameDisplacementAngle, nameParameter, onSameCircle, superIdentical

Methods inherited from class objects.EuParametrized

atParameter, atParameter, closestParameter, closureContains, distance, matchingPair, nameLocation, randomPoint

Methods inherited from class objects.EuObject

cloneObject, draw, equals, getClip, isVisible, mouseVicinity, mouseVicinity, toPs

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

inAngle

public fundamentals.EuAngle inAngle

The parameter at which the arc begins, moving counterclockwise. Normalized in [0,360)

outAngle

public fundamentals.EuAngle outAngle

The parameter at which the arc ends, moving counterclockwise. Normalized in [0,360)

Constructor Detail

EuArc

public EuArc(double x,
             double y,
             double r,
             double s,
             double t)
      throws DesignException,
             UserException

The constructor does initialization. A zero generator vector gives a LeaRuntimeException. A degenerate interval is handled by the warner.

Parameters:

x - the first coordinate of anchor

y - the second coordinate of anchor

r - the radius

s - the lo parameter of the endpoint

t - the hi parameter of the endpoint

Throws:

DesignException - if an error occurs

UserException - if an error occurs

EuArc

public EuArc()

Contructor for dummy object

EuArc

public EuArc(objects.EuArc a,
             objects.EuPoint p1,
             objects.EuPoint p2)
      throws UserException

The arc is instantiated as a subarc of the given arc, and with endspoints in the given points

Parameters:

a - an EuArc value

p1 - an EuPoint value

p2 - an EuPoint value

Throws:

UserException - if an error occurs

EuArc

public EuArc(objects.EuCircle a,
             objects.EuPoint p1,
             objects.EuPoint p2)
      throws UserException

The arc is instantiated as a subarc of the given circle, and with endpoints in the given points, going counterclockwise from p1 to p2.

Parameters:

a - an EuCircle value

p1 - an EuPoint value

p2 - an EuPoint value

Throws:

UserException - if an error occurs

Method Detail

atInEnd

public fundamentals.EuVector atInEnd()

Describe atInEnd method here.

Returns:

The coordinate of the point where the arc begins, moving counterclockwise.

anInnerPoint

public fundamentals.EuVector anInnerPoint()

Describe anInnerPoint method here.

Returns:

The coordinate of the point where the arc begins, moving counterclockwise.

atOutEnd

public fundamentals.EuVector atOutEnd()

Describe atOutEnd method here.

Returns:

The coordinate of the point where the arc ends, moving counterclockwise.

computeClip

public objects.plotCollection computeClip(fundamentals.mouseInfo info)
                                   throws InternalException,
                                          DesignException,
                                          UserException

Compute the visible portion of the object as a collection of arcs, intervals or points.

Overrides:

computeClip in class EuCircle

Parameters:

info - information used in scaling and positioning the object

Returns:

a plotCollection value

Throws:

InternalException - if an error occurs

DesignException - if an error occurs

UserException - if an error occurs

invisibleRandomPoint

protected fundamentals.EuVector invisibleRandomPoint(fundamentals.mouseInfo info,
                                                     java.util.Random croupier)
                                              throws UserException

Chooses a sensible point on the arc when the arc is invisible.

Overrides:

invisibleRandomPoint in class EuCircle

Parameters:

info - a mouseInfo value

croupier - a Random value

Returns:

an EuVector value

Throws:

UserException - if an error occurs

castIdentical

public boolean castIdentical(objects.EuObject other)

See if passed object can be cast to the present one.

Overrides:

castIdentical in class EuCircle

Parameters:

other - an EuObject value

Returns:

true if passed object is a @see EuCircle, @see EuHalf or @see EuInterval which is a subset of this one @param other the object being compared to the present one

overlaps

public boolean overlaps(objects.EuObject other)

See if another object overlaps nontrivially with this one.

Overrides:

overlaps in class EuCircle

Parameters:

other - the object being compared to the present one

Returns:

true if passed object is a @see EuCircle or @see EuArc which overlaps with this one

closestParameter

public double closestParameter(double x,
                               double y)

Find the parameter value which yields the closest point to a given one.

Overrides:

closestParameter in class EuCircle

Parameters:

x - The first coordinate of the given point

y - The second coordinate of the given point

Returns:

The parameter

interiorContains

public boolean interiorContains(fundamentals.EuVector point)

See if passed point lies inside the arc

Overrides:

interiorContains in class EuParametrized

Parameters:

point - an EuVector value

Returns:

true if passed point lies on the arc @param point the point being compared to the present arc

typeName

public char typeName()

Describe typeName method here.

Overrides:

typeName in class EuCircle

Returns:

A

isFull

public boolean isFull()

Describe isFull method here.

Overrides:

isFull in class EuCircle

Returns:

false since the item is not of subtype A_RADIUS, A_POINT, A_LINE, A_CIRCLE

params

public java.lang.String params()

Describe params method here.

Overrides:

params in class EuCircle

Returns:

A technical specification of parameters associated to the object

toString

public java.lang.String toString()

Describe toString method here.

Overrides:

toString in class EuCircle

Returns:

A technical specification of the object

passArguments

public void passArguments(fundamentals.EuArguments args)

Read off parameters describing the object and add to passed EuArguments instance

Overrides:

passArguments in class EuCircle

Parameters:

args - an EuArguments value

toNaturalLanguage

public java.lang.String toNaturalLanguage(int language,
                                          boolean determined)

Describe toNaturalLanguage method here.

Overrides:

toNaturalLanguage in class EuCircle

Parameters:

language - an int value

determined - a boolean value

Returns:

a String value